Culprit damage horticultural products , fruit flies Bactroceradorsalis complex . That includes star fruit flies Bactrocera carambolae , melon fruit fly Bactrocera cucurbitae , Bactrocera papaya fruit fly papayae , and jackfruit fruit fly Bactrocera umbrosa .
Fruit flies have the greatest destructive force when shaped larvae . inside fruit , caterpillars make fruit aisle and suck fluids . after size The maximum - to 0.7 cm or pinkie - nail along the larvae exit of fruit and pupate in the soil . The pupae were able last up to 3 months in dry soil . However , " In damp conditions shorter , only 10 days , "said Hall of Wisdom SUMANTRI of Protection Food Crops and Horticulture West Java . That explains the increase fruit flies after rainfall , even just overnight.